booth



Jan. 8, 1929. 1,698,083

w. N. BOOTH METHOD OF FORMING VEHICLE WHEEL RIMS Filed May 11, 1925 2Sheets-Sheet l Jan. 8, 1929.

W. N. BOOTH METHOD OF FORMING VEHICLE WHEEL RIMS 2 Sheets-Sheet 2 FiledMay 11, 1925 l atented Alan, 8, 1929.

sra'rt P A .Ji

METHOD OF FORMING VEHICLEWVHEEL RIMS.

Application filed May 11, 1925'. Serial No. 29,698.

The invention relates to the manufacture of vehicle wheel rims andrefers more particularly to the manufacture of tire carrying rims of thedemountable type. l-leretofore it has been the usual practice in themanufacture of a tire carrying rim to pass a bar of stock through aforming roll machine to produce an annulus. The flats at the ends ofthis bar I of stock and particularly the front end have then beenremoved either by severing the same from the formed stock or by a numberof expensive forming operations. In either case the cost of manufactureper rim has been excessive owing in the first instance to the excessivewaste of material per rim and in the second instance to the excessivecost of the necessary forming operations.

lVith my invention the cost of manufactureper rim is greatly reduced.With this as well as other objects in View the invention resides in thenovel features as more fully hereinafter set forth.

In the drawings Figure l is a side elevation of a portion of a formingroll machine and showing the method of carrying out the first operationin the manufacture embodying my invention;

Figure 2 is an end view thereof;

Figure 3 is a side elevation of severing machine and showing the methodof carrying out the second operation in the manufacture;

Figure i is a sectional end view thereof.

In the present instance a bar of stock having a cross sectioncorresponding to that of the tire carrying rims to be formed and havinga length sutlicient to produce a plurality of tire carrying rims isinserted between the forming rolls 1 and 2 and 3 of a usual forming rollmachine such as a pyramid roll machine. These rolls are arranged to bendthe stock with a constant radius of curvature as long as the stock iscompletely between the rolls. The stock after passing between the rollsis deflected out of the path of the unformed stock by the stationarydeflector 4 upon the forming roll machine, which compels the stock toassume a spiral form, or as specifically shown, a helical form. Theextent to which the stock is deflected is preferably within the limitsof elasticity of the stock. This helically formed stock may be suitablysupported while the bar is being passed between the forming rolls as bymeans of the horizontal rod 5 supported upon the upright 6.

In the present instance, after the complete hold the portion of thestock thereover bar of stock has been helically formed with a number ofconvolutions lying laterally adjacent to each other, it may then beoperated upon by severing the same to form the separate rims. As shownin Figures 3 and 4 this helically formed stock is rotated over an anvil7 until one of its ends, preferably its last formed end, comes intocontact with the stop 8 formed by suitable means such a pin projectingradially from the anvil. The anvil preferably has the supportingbrackets 9 and the die 10 which are angularly spaced thereabout, thebrackets being engageable with the outer face of the stock and the diewith the inner face of the stool: to support the same to assist inaccuratelv deter-mi the circumference. The anvil also pr L ably providedwith the pad 11 laterally adjacent to the die 10 and adapted toresiliently in lateral alignment with the portion of the stock over thedie 10. 19 is a block carried by the ram of the press and supporting thehold down pad 18 and the cutter 1a. The hold down pad is resilientlyforced downward by means of the coil spring and normally occupies aposition such that it will come into contact with the stool: above thedie 10 prior to engagement of the cutter 14 with the stock above the pad11 to thereby clamp the stock prior to its severing. The press ram isthen operated to sever the stock and form the first rim, after which theformed stock is again rotated again t the stop and the press ram isagain operated, these steps continuing until the stock has beencompletely made up into a number of rims. After the stool: has beensevered into rims, the ends of these rims will spring back intoregistration with each other owing to the fact that the deflection ofthe stock in the forming roll machine is within its limits ofelasticity.

From the above description it will be readilyscen that the cost ofmanufacture of the tire carrying rims is materially reduced owing to thefact that a plurality of rims is formed from the same stool: therebydecreasing the waste of material per rim or the number of formingoperations per rim.

lVhile it is believed that from the foregoing description the nature andadvantages of the invention will be readily apparent, I desire to haveit understood that I do not limit myself to what is herein shown anddescribed and that such changes may be resorted to when desired as fallWithin the scope of What is claimed.

What I claim as my invention is:

1. The method of forming a vehicle wheel rim member Which consists inprogressively forming with a continuous are stock having a cross sectionsubstantially of the completed rim member and of a. length to produce aplurality of rim members, deflecting the formed stock out of the path ofthe stock to be formed and into a spiral and severing the formed stockto produce a substantially completed rim member.

2. The method of forming a vehicle Wheel rim member which consists inprogressively forming With a constant curvature stool: having a crosssection substantially of the completed rim member and of a length toproduce a plurality of rim members deflecting the formed stock Withinits limits oi elasticity out of the path of the stock to be formed andinto a helix and severing the formed stock to produce substantiallycompleted rim With its ends substantially registering.

3. The method of forming a vehicle wheel rim member Which consists informing a bar of stock having a cross section substantially of thecompleted rim member and of a len th to produce a plurality of rimmembers fornirolling the bar of stock with a continuous arc and severingthe form-rolled stock at predetermined points in its length to produce asubstantially completed rim.

1. The method of forming a vehicle Wheel rim member which consists inprogressively forming With a constant radius of curvature stock having across section substantially of the completed rim member and of alengthto produce a plurality of rimrmembers, de-

fleeting the forn'ied stock Within its limits of elasticity out of thepath of the steel-1 to be formed and into helix severing the flat end ofthe f rmed stock and subsequently sever ing the formed stock atpredetermined lengths.

The method of forming a vehicle Wheel rim member which consists in pasin; a. be r of stock hav'ng a cross section subsui: tially of the comiileted rim member and ot a length to HOClIilCO a plurality of rimmembers through a )yramid roll machine tiierel 1y beeping the stockhelically :lorinin the hooped stool; and subsequently sei'ei- LllChelically termed stock at iredel'ern'iiued. points to produce aplurality of substantially completed rim members.

6. The method of form ng \eh rle wheel rim members which consist incontinuously forming from stool; oi a lOi l to produce a plurality of rm meiuliiers he. =d stool: ll: ing a cross section s "a; antiully oi?the completed rim member men-acting: the hooped stoclroutof t path oitha:toclrtobe lumped and severing the hooped steel; to produce a pluralityof substantially completed rim members.

'i'. The method of ior'iinp; vehicle rim members which eosist i formingplurality of rim members hooped s oelr having a cross sect-ion suf allyol? the completed rim member. deneetine; the hooped steel: Within itslimit o'l elasticity out oi the path of the steel: to be hooped a 1 (linto a helix and severing the hooped stock to produce a plurality of:iaubstantially completed rim members.

In testimony whereof I aili: J Q l vIllJlJl i iLliTl ll

